According to Arne Naess, his environmental philosophy is influenced by the philosophy of language called empirical semantics, which he first developed in the 1930s as a participant in the seminars of the Vienna Circle. While no one denies his claim, most of his commentators defend views about his environmental philosophy that contradict the tenets of his semantics. In particular, they argue that he holds that deep ecology’s supporters share a world view, and that the movement’s platform articulates shared principles. Naess, (...) however, rejects this conception of deep ecology, and, moreover, he is compelled to do so because of his long-standing views on semantics. Naess’s semantics thus poses a particularly difficult problem for the first group of theorists who endorsed Naess. (shrink)